Self-unloading vessel.



Patented Feb. 16, 1915.

` K. BARTH. SELF UNLOADING VESSEL.

APPLIGATIONHHLBD AML-25, 1914. 1,128,572.

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nn 'BA'nTH, or ESSEN- on-THn-nnnn, GERMANY, AssreNoR To En. Knorr AKTIENGESELLSCHAFT, or msnN-oN-Tnn-n GERMANY.

SELF-UNLOBING VESSEL.

Masera.

Specification of Letters Patent. v

Patented Feb. ld, lil.

To all lwhom it may concern:

Be it known that l, KARL BARTH, residing at Essen-on-the-Ruhr, Germany, a citizen of `the German Empire, have invented a cerloading vessels of'the character shown and described in my co-pending application Serial No 7 96,272, led October 20, 1913, and has for its object to provide a device, whereby all of the moving parte, during thetransfer of the movable bottom from unloading to loading position are'y placed approximately in indierent equilibrium,l in order to limit to aminimum the power consumption necessary to move the bottom.

One embodiment representing a self unloading car is illustrated in the accompanying drawing, where Figurel l shows a cross section ot the wagon in 'loading position, and Fig. 2 a similar View of the car in unloading position.

'llhe self unloading car is, in general, constructed as the car described in my above named application. V

Reference character A denotes the underrame of the car, A1 the two end walls, a3 the stay rod, serving as journal for the side wall C3, which has. no hinge connection withy the bottom B, -aA a beam supporting the bottom in its unloading position and C the side wall hinged to the bottom, 'the side wall C3 being provided with hooks c4.-

The bottom B is mounted to oscillate on the under-frame A by means of links D and D1, ofA U-sliaped transverse section, each two crossing each other and being ot the same length and arranged at suitable intervals along the bottom. The intersecting places of the links D and D1, the upper fulcrum points of which are much closer together than the lower ones, are situated between the vertical, longitudinal middleplane of the car and the side wall C, when the 'car is inloading position, see Fig. l, these intersecting places ot the links constituting the momentary axis of revolution of the bottom B. t its lower edge, v4the side wall C ,is provided with several handles c1, and at its two upper corners and rigidly secured thereto with two shoes c2, b means .of which the side C ps over the a ut faces on the :upper ends of the side'rails e2 of the end walls A1,'whenthe car is in loadmg position, Fig. 1, thereby supporting itself and also contributing to the support of the-end walls A1. A guide bar G, for each of the shoes c2, constitutes a link connection with 'each of two guide bearings 'at secured at the upper edge of the end walls A1. rlhe length of the bars G and the position of their axes ofrevolution has been so selected that the slide wall C, du'ring the tilting ,of the bottom B will be carried parallel in approximately perpendicular position. The slde wall C8 may-be swung around the rod a3 by means of a crank shaft'gearing provided with a hand lever Bl.

.In order to unload the car, the hand lever H is turned toward the left, so'that the lside wall Cs swings outward, the hooks c4 axis, immovable relative to the bottom B,

and situated about midway between the journals for the rods D and D1 on the bottom,'is displaced in approximately horizontal direction.

lf e denotes the center of gravity of the bottom B, 'c1 the center of gravity of the sidewall C and e the common center of gravity of the movable system comprising the bottom B and the side wall C, and supposing further that the distance between a and 32 is called S and the' distance between e1 and c2 is called Z, the ratio has obviously then a constant value equal to th'e ratiov between the weights'o the bottom B and the side wall C, this ratio in the following being denoted by the character' k. Supposing now, that the point p-at which point the axis of the journal connecting the bottom B with the vwall C intersects with the vertical plane passing throughthe straight line s-cz-slis connected with the points c1 and s, and that a point g is so fixed on the line p-s, that the ratio when the distance between g and p is called X and that between g and e is called Y, then ico 1 the line g-s will always be parallel with the line pfsf, and have a constant value of nal' axis of the bottom, which axis travels vof the connecting rods D and approximately in horizontal direction, `the point g will then' move in an approximately horizontal line, during the tiltin movement of the bottom. Consequently, t e common center of gravity s2 must obviously also move `in anapproximately horizontal line because it possesses a constant distance from the point g in adirection which always remains 'the same. The movable system,

formed by the bottom and the side wall C,

willt therefore be in approximately indifferent equilibrium with each diii'erent position of the bottom: The influence of the other movable parts on the equilibrium of the entire movable system composed of the parts B, C, G, D, D1, is only slight, and may moreover' be easily compensated for by a slight displacement toone side of the connecting rods D and D4.

In consequence of the parallel transfer of the side wall C, itwill therefore be attained with great. exactitude that the entire movable -system is in approximately indifferent equilibrium with each different position of the bottom. Without anyappreciable exertion, thel bottom may therefore be swung vback into loading position, Fig. 1, from unloading position, Fig. 2, by pulling on the handles c1. This position is attained at that moment, when the downward swinging side wall C grips with its shoes c2 over'theabutment faces on the upper ends of the side bars a2, thus being prevented from continued downward oscillation. By turning, the

hand lever H, the side wallC3 is thereupon swung back 'into its perpendicular final position, when it grips with itshook c4 underneath thebottomv B, securing .the latter from unintentional opening movement.

As the axis of revolution of the bottom B, which is determined by the crossingpoints D1, is displaced toward the unloading side duringthe opening movement, the side wall C executes claim 1. A` self unloading vessel comprising a frame, a receptacleof rectangular cross section when in loadingposition, saidreceptacle having two end walls .rigidlfmounted on said frame and" a 'bottom vadapted to swingY about an axis parallel to the' central longitudinal axis of the: re,("BIi-Cle andlyin betweenl this lon 'tudinal'axis and one 0% the `side Walls oithe receptacle, thisside wall being hinged to'said bottom', and connectingl membersfor said hingedvside wall being.V` so arranged that said side wall when yin unloadingl position is at least'approxi-- mately para elv toitself when'lin loading t position.

2. A self unloading vessel comprising a frame and a receptacle.; said receptacle having movable bottom and' sides; one ofthe sides beinghinged to the bottom; means connecting said bottom 'with lsaid frame, said means causing the axis of oscillation of said bottom to traveltoward the discharge sidewhen unloading. i

3. A self unloading vessel comprising a frame anda receptacle; saidireceptacle having movable bottom and' sides; one of the vsides beinghingedfto the bottom, connectingmembers for said hinged side being so arranged that said side when in unloadin position is .at least approximately paralle to itself when -in loading posltion; means connecting said bottom with said frame, said means causingthe axis of oscillation of said bottomito travel toward the Idischarge side when unloading.

- 4; A self unloading vessel comprising .a frame and a receptacle; said receptacle havin movable bottom and sides; one of the sicles being hinged to the bottom; crossed connecting rods having ,hinged connection both with said bottom and said frame, the fulcrum points on the bottom being so much closer ltogether than the fulcrum point's'on the frame, that a point centrally situated between said bottom fulcrum points, travels in an approximately horizontal direction dur` ing f the transfer :of the bottom from' vthe loading to the unloading position.

The foregoing specification signed at Barmen, Germany, this 4th 'day of April,

. i KARL BARTH. [1.. s] In presence ofr HELEN NUFLR, ALBERT N13-FER. 

